Lens and an asymmetrical light distribution illuminating device having such lens
US9212804B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2012 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Sep 13, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens for a linear light source may include a top and a bottom, the bottom including an incident surface, and a first supporting surface and a second supporting surface respectively at each side of the incident surface, and the top including an emergent surface, wherein the top further comprises a total internally reflective surface, and wherein in a cross section, the emergent surface is joined with the first supporting surface, the total internally reflective surface is joined with the second supporting surface, one part of light from the linear light source incidents into the incident surface and emerges after refracted by the emergent surface, and the other part of light incidents into the incident surface and reflected by the total internally reflective surface and then emerges after refracted by the emergent surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.